text: Tris(2-phenylpyridine)iridium, abbreviated [Ir(ppy)] is the organoiridium complex with the formula Ir(CH-CHN).  The complex, a yellow-green solid, is a derivative of Ir bound to three monoanionic 2-pyridinylphenyl ligands.  It is electroluminescent, emitting green light.  The complex is observed with the facial stereochemistry, which is chiral.
  The complex is prepared by cyclometalation reactions of 2-phenylpyridine and iridium trichloride, as represented by this idealized equation:
  :IrCl  + 3CH-CHN  →  Ir(CH-CHN)  +  3 HCl
  The complex and many analogues have been investigated for application in photoredox catalysis. Its excited state has a reduction potential of −2.14 V, nearly 1 V more negative than the reduction potential of excited [[Ruthenium tris(bipyridine)|[Ru(bipy)]]].